Comment 14 for bug 849414

These crash reports are caused by a bug in plymouth, the boot-time splash screen. Sometimes the errors are not reported for quite a while after the crash actually happens.

If someone here is able to reproduce this bug reliably, please do the following:
- edit /etc/default/grub so that GRUB_CMDLINE_LINUX_DEFAULT is set to "quiet splash plymouth:debug"
- run sudo update-grub
- reboot, and when you receive the prompt asking whether to report a crash about plymouthd, say "yes"
- attach /var/log/plymouth-debug.log to the new bug report